Fastmac has introduced its U-Connect Universal Dock Connector Adapter for the second-generation iPod shuffle. Available in black or white, the U-Connect Adapter features a headphone plug/connector on one end and a standard 30-pin Dock Connector on the other, allowing the shuffle to be used with most iPod accessories, as well as a switch to toggle between music and charging modes. “Many owners of iPod shuffle also own other iPods and our…